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    Impact of thermal diffusion on lean near-limit H2-CH4-air flames

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    Type
    Conference Paper
    Authors
    Hernandez Perez, Francisco
    Im, Hong G. cc
    Zhou, Zhen
    Shoshin, Yuriy
    van Oijen, Jeroen
    de Goey, Philip
    KAUST Department
    Clean Combustion Research Center
    Computational Reacting Flow Laboratory (CRFL)
    Mechanical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2019-01-06
    Online Publication Date
    2019-01-06
    Print Publication Date
    2019-01-07
    Permanent link to this record
    http://hdl.handle.net/10754/630938
    
    Metadata
    Show full item record
    Abstract
    In this research work, we investigate the influence of transport models and thermal diffusion (Soret effect) on numerical predictions of zero-gravity flame balls as well as normal-gravity steady and closed burner-stabilized reacting fronts for lean hydrogen-methane-air premixed mixtures, having a 40% hydrogen (H2) and 60% methane (CH4) fuel composition, specified on a molar basis. Three transport models are considered in the simulations: mixture-averaged, multicomponent, and multicomponent with inclusion of thermal diffusion. Although differences are found between the mixture-averaged and multicomponent solutions, they are not as prominent as those found when thermal diffusion is accounted for. The inclusion of thermal diffusion leads to predictions of larger flame sizes for both the zero-gravity flame balls and the normal-gravity burner-stabilized flames. Furthermore, lower lean limits are predicted when thermal diffusion is included in the computations.
    Citation
    Hernandez Perez FE, Im HG, Zhou Z, Shoshin Y, van Oijen J, et al. (2019) Impact of thermal diffusion on lean near-limit H2-CH4-air flames. AIAA Scitech 2019 Forum. Available: http://dx.doi.org/10.2514/6.2019-2366.
    Sponsors
    The first two authors were supported by King Abdullah University of Science and Technology (KAUST). Computational resources were provided by the KAUST Supercomputing Laboratory (KSL).
    Publisher
    American Institute of Aeronautics and Astronautics (AIAA)
    Journal
    AIAA Scitech 2019 Forum
    DOI
    10.2514/6.2019-2366
    Additional Links
    https://arc.aiaa.org/doi/10.2514/6.2019-2366
    ae974a485f413a2113503eed53cd6c53
    10.2514/6.2019-2366
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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